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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVE-2025-6853

High
9.3/10

Summary

A vulnerability has been found in chatchat-space Langchain-Chatchat. This affects the function "upload_temp_docs()" of the file "/knowledge_base/upload_temp_docs" of the Backend component. The manipulation of the argument flag leads to Path Traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-22 - Path Traversal

Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.

References

Advisory Timeline

  • Published